154 Transactions of the South African Philosophical Society. 



of the ventral surface, the plate somewhat saddle-shaped, the anterior 

 part not raised and gradually passing over into the soft integument, 

 the hind part distinctly hardened and browned, emarginate in the 

 middle of hind margin, with transverse cluster of short setae. No 

 differentiated plate posterior to genital opening (PI. XI., fig. 26). 

 Length 7J, of carapace 3-§-, of first leg 26^ mm. 



The adult ? $ of the 3 South African species may be distinguished 

 as follows : — 



a. Vulva placed far forward, the epigastric area not produced backwards in the 

 middle below, where its hind margin is broadly sinuated, the sinus touching a 

 line joining the hind ends of the pulmonary spiracles. Cape Peninsula. 



D. capensis,* E. Sim. 



b. Vulva placed at or near middle of ventral surface of abdomen, the epigastric 

 area very strongly produced backwards in the middle below far behind the 

 spiracles, the posterior part at least being hardened to form an epigynum. 



a 1 . Plate of vulva very large, reaching anterior end of abdomen ; vulva closed 

 behind by a small, transverse, vertical sclerite. Knysna. J), silvicola, n.sp. 



b l . Plate of vulva much smaller, not reaching anterior end of abdomen ; the 

 vulva without additional posterior sclerite. Swellendam. 



D. producta, n. sp. 



Family DYSDEEIDiE. 



Gen. AEIADNA, Aud. 

 1. Ariadna dentigera, n. sp. 



1 $ (No. 8600) from the side of Table Mountain above Newlands 

 (W. F. P., August, 1900). 



Colour. — Carapace dark reddish-brown, paler behind but almost 

 black anteriorly, with iridescent sheen, the margins finely blackened; 

 chelicera black, with strong iridescent sheen (in spirits) ; abdomen 

 pale fulvous yellow below, brown between the pulmonary opercula, 

 the dorsal surface dark violaceous ; legs and sternum reddish-ochra- 

 ceous, the anterior legs slightly more reddish distally bat without 

 dorsal markings, the sternum brown at the margins, iridescent, 

 darker in the strong, intersegmental, lateral depressions. 



Carapace as long as the tibia and f of the metatarsus of first leg, 

 very broad in front, its width just behind the ocular area almost 

 equalling the length of the first tibia. Ocular area wide, the dis- 

 tance between the median and posterior lateral eyes slightly exceed- 

 ing the width of the 2 median eyes together ; the eyes subcontiguous 



* The type of this species was very immature, for the adult ? , which is larger 

 than either of the two new species, attains a length of 13J mm., the length of the 

 first leg (from base of femur) being 47 mm. 



